Filler for rubber.



Patented February 7, 19,05.

UNiTEn STATES PATENT OFFICE.

JOSEPH ROSS HUNTITER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOH. T0 WILLlAhi HINCKLE SMlTH, OF PHILADELPHIA. PENNQYLVANTA.

FlLLER FOR RUBBER.

SPECIFICATION forming part of Letters Patent Application filed July 16, 1904. Serial No. 216,873.'

No. 781,881, dated February 7, 1905.

To a]! whom it may concern:-

Be it known that l, Josnrn Ross HUNTER,

than the usual proportion of rubber and to a obtain a l t hter and more homogeneous prodcitizen of the United States, residing in the not having unusual qualities and powers of city and county of Philadelphia, State of Pennsylvnma, have invented a new and useful improvement in Fillers for Rubber, of which the l mable, following is a specification.

The object of my invention is to provide a liller for rubber which shall reduce the weight of the product greatly.

Another object of my invention is to sup ply a tiller for rubber which shall act as a binder to unite the partsof the resultant composition with great firmness.

A further object of my invention is to providea filler-for rubber which is n0niniiammable, a non-conductor of heat and electricity, impervious to moisture, and little affected by the ordinary acids and iiuids, said filler impartingor maintaining these characteristics to or in the resultant rubbercomposition.

in carrying out my invention I combine with the rubber finely-divided bone from which fluid, fatty and mineral matters, such as lime,have been removed, usually called ossein, the residuum being preferably in the form of fibers. The proportions of bone and rubber or bone and shoddy (reclaimed rubber) or bone and shoddy and rubber rcquircd vary greatly with the purpose for which the composition is to be used; but my tiller has been found to' require less of rubber or shoddy or of both than clays, earths, and other present known tillers by reason both of the natural cohesion of the particles of my filler and the bonding effect of the fibers preforably used. For this reason it has been possible in many cases where my tiller is used to dispense with the interspersed layersoi cloth or other reinforcing material used in the manufacture of many articles While using less resistance ,to the elements, acids, wear, &c.

My'filler is itself quite light, non-inflama non-conductor of heat and of elec tricity, impervious to moisture, and but little affected by the ordinary acids and fluids. The combination resulting from its use as a filler for rubber partalies of these qualities and tits the rubber so formed for special uses for which rubber having other fillers is unsuit-.

able. 7

lriaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, i's

1. A filler for rubber-consisting of shreds from bone.

2. A filler for rubber consisting of fibers I of delirned bone. 7 V p 3. A filler for rubber consisting of fibers of bone from which fluid matters have been removed. I

4. A filler for rubber consisting of shreds of bone from which mineral removed.

matter has been 1 5. A filler for rubber consisting of finely-- divided bone from which been removed.

6. A. filler for rubber 7. A filler for rubber-consisting of bone from which fluid fatty and mineral matters have been removed. I

8. A filler for rubber consist-ingot delimed animal tissue.

9. A filler for rubber consisting of finely-- delimed fibrous material. JOSEPHROSS l-lUNTF-R. v Witnesses:

WM. CANE Wmonnsnm,

W. S. JACKSON.

divided mineral matter has consisting of ossein. 

